77623217 has 8 divisors (see below), whose sum is σ = 90386496. Its totient is φ = 65278512.

The previous prime is 77623201. The next prime is 77623237. The reversal of 77623217 is 71232677.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77623217 - 2⁴ = 77623201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77623237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104243 + ... + 104984.

It is an arithmetic number, because the mean of its divisors is an integer number (11298312).

Almost surely, 2^77623217 is an apocalyptic number.

It is an amenable number.

77623217 is a deficient number, since it is larger than the sum of its proper divisors (12763279).

77623217 is a wasteful number, since it uses less digits than its factorization.

77623217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209287.

The product of its digits is 24696, while the sum is 35.

The square root of 77623217 is about 8810.4039067457. The cubic root of 77623217 is about 426.5767808562.

The spelling of 77623217 in words is "seventy-seven million, six hundred twenty-three thousand, two hundred seventeen".